Sharpening device



Oct. 13, 1931. M. A. MATTHEWS SHARPENING DEVICE Filed Feb. 18. 1930 A TTORNE Y.

Patented Oct. 13, 1931 PATIENT; OFFICE MARIAN A. MATTHEWS, or NEWBUBGH, NEW YORK SHABPENING DEVICE Application. filed February is, 1930. Serial in. 429,422.

T-his invention-relates to a sharpening device for knives andshear blades, and has for its object to provide, in a manner as hereinafter set forth, a device of the class referred to'for efficientl'y'and expeditiously sharpening' aknife or shear blade when desired. A further object of the invention is to provide, ini amanner as hereinafter set forth, a device of the class referred to including means so constructed and arranged to overcome the cutting. of-low places or hollows in a knife or shear blade on removing notches or broken places in the cutting edge of the blade. A further object of'the' invention is to provide, in a manner as hereinafter set forth, a

sharpening device for thepurpose referred to including means for adjusting it to enable the use thereof when shar'penin'ga knife or shear blade of different thicknesses to insure for carrying of the proper bevel of the cutting (13d e i I a M further object of the invention is to provide, in a manner'as hereinafter set forth, a

. sharpening device of the class referred to in- I 2.5 eluding a set of pivotallysupported cutting blades and adjustable guiding" means to change the size of the cutting space for varying thicknesses of knife and shear blades whereby the cutting blades can act in an efii- "QO cient manner forthe purpose of sharpening the knife or shear blade. v A further object of the invention is to provide, in a manner as hereinafter set forth, a sharpener device for the purpose referred to l including a set of pivotally supported cutting blades, each ofoblong contour and with the mounting for such blades permitting of the fourcutting edges of the latter being utilized theirentire length L Further objects of the invention are to provide, in a manner as hereinafter set forth, a V sharpening device for the purpose referred to which'is simple in its construction and ar rangement, strong, durable adjustable, thoroughlyefiicient in its use, readily assembled, expeditiously set for sharpening purposes andic'omparatively :inexpensive to manufacture; a

"' I ;With the, foregoing and other objects in view the invention consists of the novel construction, combination and arran ement of parts as hereinafter more speci c'ally described, and illustrated in the accompanying drawings, wherein is shown an embodiment u of the invention, but it is to be understood that changes, variations and modifications can be resorted to which fall within the scope of the claims hereunto appended.

In the drawings wherein like reference characters denote corresponding parts throughout the several views I Figure 1 is a side elevation of a sharpening device in accordance with this invention.

Figure 2 is an end view thereof. I

Figure 3 is a longitudinal sectional view of the device.

I Figure 4 is an inverted plan of the upper retainer for the'upper' end of the set of cutting blades.

Figure 5 is a top plan view of the lower retainer for the lower end of the set of cutting blades.

Referring to the drawings in detail, 1 denotes a base meinber having a portion thereof of greater height than the remaining portion and such portion of greater height is indicated at 2 and provides a shoulder 3. The base 1 is of rectangular contour and the shoulder 3 extends lengthwise thereof and is disposed between the ongitudinal center of the base 1 and one side edge thereof.

The base 1' is constructed of metal and has arranged upon its upper face, centrally thereof, a transversely extending retainer and fulcrum for the lower ends of a set of cuttin or sharpening blades to be presentl referred to. The combined retainer and fu crum element is indicated generally at 4 and is formed on the low part 5 of the base 1. The element 4 provides a pocket 6 and the side walls of the latter are indicated at 7, 8 and the end walls at- 9, 10. The pocket 6 is of substantially rectangular contour and is disposed transversely with respect to base 1. The end walls 10 are set up from two oppositely extending, inclined parts, which at the center thereof provides a fulcrum point 11. The parts of the wall 10 extend inwardly from the side walls 7,

8. The end wall 9 has its inner side disposed 13$ i at two Opposite inclinations to provide a fulstanti'al distance from the element l. Each of i said members includes a bottom 15 and a pair crum point 12which is arranged in alignment with the fulcrum point 11. t I

Mounted upon the part 5 of the base 1 is a pair of vertically disposed inverted, yokeshaped members referred to generally at 13, 14:. Thememhers 13, ltfare spaced a sub-- ofside arms 16, 17 which are vertically dis- 7 posed. The arms 17 abut against-the shoulder 1 3 andproject a substantial distance aboye the base 1; The bottom of each member 13; 14"

- is slotted as at,18 and extending through base. 1 and slots 18 are screws 19 carrying on the ipp e-. nd bindi nu s 0- -The r g m t at wperm of hea' jus ng it v the member13orlet towards and from a. side oftheelement J; when occasion requires and fen-maintaining them in; the; position to whichthey havebeenvadjusted." I The members 13;.14 provide supports for the shafts 21 of upstaindingadjustab]e, yokeshapedguide members referred to generally 3 22,23.

Each guidemember includes a pair of side arms 24;25 anda curvedljtop 26. The guide members22, 23 extend down into-the members 13', 14 andlproject inwardlytherefrom toward the-element 4 Zan d are further positioned abovemeinbere. The inner lower corners of the "guide members 22, 23 are posie tioned in superposed relation with" respect .7 to .element' l; :See Figure 3 'gElementsf22, 23

extend at an inclination with respect to the members 13; 14.1; The arms 25;,125 of each guide member -at a point-between the ver- I ti'cal median andouter edge thereof are pro;

vided withali nin o enin sfOrQthe .assa e ofafs'haft' 21. Thearm25of eaoh guide mem{ benispositioned against theinnerface of an arm -17 of a member :13. Zor 14;. The arm 24 of e a ch 'gi'ui'de member is positioned in spaced relation with. respect/to an arm 16 of V a supporting ,member 13 one, The arms 16, 17 of each sup ortin member are formed with aligning openingsp for the passage of the shafts 21 and the openings in the arms 16, 17

align withthe openingsinthe arms 24, 25.

V The s'hafts21 are provided with sleeves 27. Eachsleeve 27 is positionedbetween the arms 24,' 25.,of a guide member. Eachsha-ft 21' carriesa wastage which-is interposed I betweenfthe. arm 24 of aguide member and the arm 16 0f a supporting menil'ier. The

' shafts 21 are'headedas indicated at 29 and abut again t the outer faces :of the arms. 17 of. the; supporting 1 members. The shafts 21. are also threadedas' indicated at 30 and en gaging with the threaded portions are bind ing nutswhichabutiagainst the arms 16 of the}. supporting members..' The sleeves 2,7 maintain the arms 24,.25-on' the guidemem- 7 b'ers permanently im-spaced relation with :re-

guide members can be adjusted on the shafts 21 to various angular positions with respect to the arms of the supporting members 13, 14.

The guide members 22 23 are releasably maintained in adjusted position by a bolt 32,

a nut-33 and with the bolt carried by an arm 17 of a member 13or 14. The bolt32 extends through an arcuate slot3 4 foltmed inthe lower portion-of the arm 25of a guide member.

' The nut 33 abuts against theinner face of the arm 25 for the pu-rp'o'se of maintaining the guide member in its adjusted position.

' Formed integral with the low part 5 of the base .1, centrally thereof is avertically disposed post 34' provided with a head 35 integT 1 W h the end-wall 9,01? th el ment4.H.-.

I Secured upon the and fulcrum; element 37 for {the upperend of the set ofcutting or sharpening blades.- The lower face of the element 37 is formed with a recess 38. for the receptionpf the jh'ead 35 The element 37 is formed with an opening 39 through which extends a holdfastdevice 40 which engages with the post 3 34 for detach ably securing -the elem'ent 37 therewith. The lower face of theelement 37 isprovided with a substantially rectangular pocket tlffor the reception of the uppeiiend-of a Set Q-fcnt and a base-.36. The lowerfendof the post 34 g tingor Sharpening-blades, Thefpocket 4H hasa pair of side walls 12 13and=;a pair of endrwalls 44, 45, Theiside and endg allsnf manner as the side and end walls of .the pocket 6 therefore the endwall 4 10f pocket tl has a fulcrumpoint 4 6 and zthegend wall 45 a fulcrum point 47.; 'iThe'fulcrum points ltiand Mare-arranged in alignment-with" the fulcrumpoints 11, 12.

the pocket 4.1 are constructed in the-same 1 A set of cutting or sharpening indicated at 49 generally andthegnumher of the blades of the set canbeas desired, shut by way of example the set49 is illnstratedas consisting of five blades 50,151,572, 53' and 5.4;

. in thepocket 6. The set of:blade's is mounted whereby itcan bodily: shift opposite directions during the sharpening-operation. The. b1ade50 of the Set-4911381138 outer side oppose the fulcrum:. points 11, A6 and bears thereagainst. Th e outeriside of the blade "54 opposesthe fulcrum points 12" and 17 and bears :thereagainst. Thelset ofgblades-"49' is so mountedthat awhena knife forshe'ar blade is moved in one directionthe set of blades will fulcrurnion the points '11: and .46: and

7 inwardly therefrom is a-combinedcretainer t when moved in the opposite direction will 7 fulcrum on the points 12 and 47.

The guide members 22, 23 are arranged relatively to the set of blades 47 to provide passages 55, 56 for the positioning of the knife or shear blade when it is desired to sharpen the same. The guide members 22, 23 are arranged at an inclination relative to the set of blades 49 and are adjusted so that the desired bevel with respect to the knife or shear blade will be maintained.

The cutting or sharpening blades are made of high tempered steel and are alternately arranged in the manner referred to so as not to cut low places or hollows in the knife or shear blade while removing notches or broken places in the cutting edge of such blades.

The set of cutting blades is so mounted so as to adjust itself to throw the square cutting edge of the blades of the set in a sharp cutting position.

The element 37 can be quickly detached from the post 34 to enable the removing and replacing or changing of the position of the blades of the set. The cutting blades can be used on their four edges for the entire length thereof, by reversing the top of blade to the bottom and reversing back of blade to front position. By this arrangement all the cutting edges of the blades can be placed in service. The blades are perfectly square on edges from top to bottom. The shifting positions in which the blades are placed provide for the knife blade to control the cutting unit in serviceable position.

It is thought the many advantages of a knife or shear blade sharpening device, in accordance with this invention can be readily understood, and although the preferred embodiment of the invention is as illustrated and described, yet it is to be understood that changes in the details of construction can be had which fall within the scope of the invention as claimed.

What I claim is:

- 1. A sharpening device comprising a bodily shiftable sharpenin unit formed of a set of blades, the alternate blades of the set being of the same width and of a different width than the width of the other blades of the set, a mounting for said set to provide for the fulcruming of the set for movement in opposite directions during the sharpening operation, and adjustable means opposing the edges of the blades of said set to provide passages for the objects to be sharpened during the sharpening operation, said adjustable means being angularly disposed with respect to said set.

2. A sharpening device comprising a bodily shiftable sharpening unit formed of a set of blades, a mounting for the ends of said set to provide for the fulcruming of the set for movement in opposite directions during the sharpening operation, and bodily and angularly adjustable guiding'means arranged at each side of the set and angularly disposed with respectthereto. a 3.:A sharpening device comprising a vertically disposed, bodily shiftable sharpening unit formed of a set of oblong, alternately disposed blades, the alternate blades being of the same width and of a different width than the width of the other blades of the set, angularly adjustable guiding means opposing the lengthwise edges ofsaid blades, and a mounting for the upper and lower ends of said set to provide for the fulcruming of the set for movement in opposite directions during the sharpening operation. 4. A sharpening device comprising a vertically disposed, bodily shiftable sharpening unit formed of a set of oblong, alternately disposed blades, the alternate blades being of the same width and of a different width than the width of the other blades of the set, angularly adjustable guiding means opposing the lengthwise edges of said blades, and a mounting for the upper and lower ends of said set to provide for the fulcruming of the set for movement in opposite directions during the sharpening operation, the mounting for the upper end of said set being detachably secured in position. v

5. A sharpening device comprising a vertically disposed, bodily shiftable sharpening unit formed of a set of oblong blades, a

mounting for the upper end of said set, said mounting provided with apocket having the end walls thereof formed with aligning fulcrum points bearing against the sides of said set, a mounting for the lower end of said set including a pocket having its end walls formed with aligning fulcrum points bearing against the sides of said set, said fulcruming points providing for the bodily shifting of said set during the sharpening operation, and adjustable guides mounted adjacent the edges of said blades and angularly disposed with respect thereto.

6. A sharpening device comprising a pair of spaced, angularly disposed guide members, a vertically disposed, bodily shiftable sharpening unit formed of a set of opposed, oblong cutting blades having squared edges, and means enclosing the upper and lower ends of said set to provide for the fulcruming of the set for movement in opposite directions durirrg the sharpening operation.

7. sharpening device comprising a pair of spaced, angularly disposed guide members, a vertically disposed, bodily shiftable sharpening unit formed of a set of opposed, oblong cutting blades having squared edges, and means enclosing the upper and lower ends of said set to provide for the fulcruming of the set for movement in opposite directions during the sharpening operation, certain of said b ades being of greater width than the others,fand thebl'ades of; greater'widthbeing alternatelydisposed with respect tothe other blades,"v *QW q I w: v8. A sharpening device ;.comprisi-r g; .al;;pair

I of spaced,]angula rlydisposed guide-members,

a vertically disposed, bodily shiftgble sharp, ening 'unit formed of a set. of'opposedroblong-"cutting blades having squared edges, .IIiBfiIlS enclosing the upper .and lowen ends ofsaiid set toprovide for; the fulcruminggof the, set forgmovement inxopposite directions during the, sharpening operationgend.means to pltovide'afor bodily shifting said guide memberstowards and fromsaid set andffor angularlyladjusting said members relativeto said set. v V I A'sharpeningdevioe .oomprisin'gepair if.vlspeced,iangulecrly "disposed jguidemem te.1:s,--.,a vertically disposed; bodily shifteble" sharpeningumtformedof a set of opposed,

Oblong cutting blades having squared edges, limims enclosing the upper and lowerie'ndsaof said set toprovide; for; the fulcruming. of; the. set for movement in oppositedirections dur-v ing the sharpening operation, certain of said blades being of greater Width then the others, i the blades of greater Width being alternately fliSpose'd With respect tothe other blades, and, I means to provide for, bodily shifting said guide members towards and from said set and for angularly adjusting said members reletiveto said set; 1 f 1 I11 testimony whereof, I aflix my signature eretow w I -"-1' MARIANA. x 

